1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Midi synth routines for the Emu8k/Emu10k1
4 *
5 * Copyright (C) 1999 Steve Ratcliffe
6 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
7 *
8 * Contains code based on awe_wave.c by Takashi Iwai
9 */
10
11 #include <linux/export.h>
12 #include "emux_voice.h"
13 #include <sound/asoundef.h>
14
15 /*
16 * Prototypes
17 */
18
19 /*
20 * Ensure a value is between two points
21 * macro evaluates its args more than once, so changed to upper-case.
22 */
23 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
24 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
25
26 static int get_zone(struct snd_emux *emu, struct snd_emux_port *port,
27 int *notep, int vel, struct snd_midi_channel *chan,
28 struct snd_sf_zone **table);
29 static int get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan);
30 static void terminate_note1(struct snd_emux *emu, int note,
31 struct snd_midi_channel *chan, int free);
32 static void exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port,
33 int exclass);
34 static void terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free);
35 static void update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update);
36 static void setup_voice(struct snd_emux_voice *vp);
37 static int calc_pan(struct snd_emux_voice *vp);
38 static int calc_volume(struct snd_emux_voice *vp);
39 static int calc_pitch(struct snd_emux_voice *vp);
40
41
42 /*
43 * Start a note.
44 */
45 void
46 snd_emux_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
47 {
48 struct snd_emux *emu;
49 int i, key, nvoices;
50 struct snd_emux_voice *vp;
51 struct snd_sf_zone *table[SNDRV_EMUX_MAX_MULTI_VOICES];
52 unsigned long flags;
53 struct snd_emux_port *port;
54
55 port = p;
56 if (snd_BUG_ON(!port || !chan))
57 return;
58
59 emu = port->emu;
60 if (snd_BUG_ON(!emu || !emu->ops.get_voice || !emu->ops.trigger))
61 return;
62
63 key = note; /* remember the original note */
64 nvoices = get_zone(emu, port, ¬e, vel, chan, table);
65 if (! nvoices)
66 return;
67
68 /* exclusive note off */
69 for (i = 0; i < nvoices; i++) {
70 struct snd_sf_zone *zp = table[i];
71 if (zp && zp->v.exclusiveClass)
72 exclusive_note_off(emu, port, zp->v.exclusiveClass);
73 }
74
75 #if 0 // seems not necessary
76 /* Turn off the same note on the same channel. */
77 terminate_note1(emu, key, chan, 0);
78 #endif
79
80 spin_lock_irqsave(&emu->voice_lock, flags);
81 for (i = 0; i < nvoices; i++) {
82
83 /* set up each voice parameter */
84 /* at this stage, we don't trigger the voice yet. */
85
86 if (table[i] == NULL)
87 continue;
88
89 vp = emu->ops.get_voice(emu, port);
90 if (vp == NULL || vp->ch < 0)
91 continue;
92 if (STATE_IS_PLAYING(vp->state))
93 emu->ops.terminate(vp);
94
95 vp->time = emu->use_time++;
96 vp->chan = chan;
97 vp->port = port;
98 vp->key = key;
99 vp->note = note;
100 vp->velocity = vel;
101 vp->zone = table[i];
102 if (vp->zone->sample)
103 vp->block = vp->zone->sample->block;
104 else
105 vp->block = NULL;
106
107 setup_voice(vp);
108
109 vp->state = SNDRV_EMUX_ST_STANDBY;
110 if (emu->ops.prepare) {
111 vp->state = SNDRV_EMUX_ST_OFF;
112 if (emu->ops.prepare(vp) >= 0)
113 vp->state = SNDRV_EMUX_ST_STANDBY;
114 }
115 }
116
117 /* start envelope now */
118 for (i = 0; i < emu->max_voices; i++) {
119 vp = &emu->voices[i];
120 if (vp->state == SNDRV_EMUX_ST_STANDBY &&
121 vp->chan == chan) {
122 emu->ops.trigger(vp);
123 vp->state = SNDRV_EMUX_ST_ON;
124 vp->ontime = jiffies; /* remember the trigger timing */
125 }
126 }
127 spin_unlock_irqrestore(&emu->voice_lock, flags);
128
129 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
130 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
131 /* clear voice position for the next note on this channel */
132 struct snd_emux_effect_table *fx = chan->private;
133 if (fx) {
134 fx->flag[EMUX_FX_SAMPLE_START] = 0;
135 fx->flag[EMUX_FX_COARSE_SAMPLE_START] = 0;
136 }
137 }
138 #endif
139 }
140
141 /*
142 * Release a note in response to a midi note off.
143 */
144 void
145 snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
146 {
147 int ch;
148 struct snd_emux *emu;
149 struct snd_emux_voice *vp;
150 unsigned long flags;
151 struct snd_emux_port *port;
152
153 port = p;
154 if (snd_BUG_ON(!port || !chan))
155 return;
156
157 emu = port->emu;
158 if (snd_BUG_ON(!emu || !emu->ops.release))
159 return;
160
161 spin_lock_irqsave(&emu->voice_lock, flags);
162 for (ch = 0; ch < emu->max_voices; ch++) {
163 vp = &emu->voices[ch];
164 if (STATE_IS_PLAYING(vp->state) &&
165 vp->chan == chan && vp->key == note) {
166 vp->state = SNDRV_EMUX_ST_RELEASED;
167 if (vp->ontime == jiffies) {
168 /* if note-off is sent too shortly after
169 * note-on, emuX engine cannot produce the sound
170 * correctly. so we'll release this note
171 * a bit later via timer callback.
172 */
173 vp->state = SNDRV_EMUX_ST_PENDING;
174 if (! emu->timer_active) {
175 mod_timer(&emu->tlist, jiffies + 1);
176 emu->timer_active = 1;
177 }
178 } else
179 /* ok now release the note */
180 emu->ops.release(vp);
181 }
182 }
183 spin_unlock_irqrestore(&emu->voice_lock, flags);
184 }
185
186 /*
187 * timer callback
188 *
189 * release the pending note-offs
190 */
191 void snd_emux_timer_callback(struct timer_list *t)
192 {
193 struct snd_emux *emu = from_timer(emu, t, tlist);
194 struct snd_emux_voice *vp;
195 unsigned long flags;
196 int ch, do_again = 0;
197
198 spin_lock_irqsave(&emu->voice_lock, flags);
199 for (ch = 0; ch < emu->max_voices; ch++) {
200 vp = &emu->voices[ch];
201 if (vp->state == SNDRV_EMUX_ST_PENDING) {
202 if (vp->ontime == jiffies)
203 do_again++; /* release this at the next interrupt */
204 else {
205 emu->ops.release(vp);
206 vp->state = SNDRV_EMUX_ST_RELEASED;
207 }
208 }
209 }
210 if (do_again) {
211 mod_timer(&emu->tlist, jiffies + 1);
212 emu->timer_active = 1;
213 } else
214 emu->timer_active = 0;
215 spin_unlock_irqrestore(&emu->voice_lock, flags);
216 }
217
218 /*
219 * key pressure change
220 */
221 void
222 snd_emux_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
223 {
224 int ch;
225 struct snd_emux *emu;
226 struct snd_emux_voice *vp;
227 unsigned long flags;
228 struct snd_emux_port *port;
229
230 port = p;
231 if (snd_BUG_ON(!port || !chan))
232 return;
233
234 emu = port->emu;
235 if (snd_BUG_ON(!emu || !emu->ops.update))
236 return;
237
238 spin_lock_irqsave(&emu->voice_lock, flags);
239 for (ch = 0; ch < emu->max_voices; ch++) {
240 vp = &emu->voices[ch];
241 if (vp->state == SNDRV_EMUX_ST_ON &&
242 vp->chan == chan && vp->key == note) {
243 vp->velocity = vel;
244 update_voice(emu, vp, SNDRV_EMUX_UPDATE_VOLUME);
245 }
246 }
247 spin_unlock_irqrestore(&emu->voice_lock, flags);
248 }
249
250
251 /*
252 * Modulate the voices which belong to the channel
253 */
254 void
255 snd_emux_update_channel(struct snd_emux_port *port, struct snd_midi_channel *chan, int update)
256 {
257 struct snd_emux *emu;
258 struct snd_emux_voice *vp;
259 int i;
260 unsigned long flags;
261
262 if (! update)
263 return;
264
265 emu = port->emu;
266 if (snd_BUG_ON(!emu || !emu->ops.update))
267 return;
268
269 spin_lock_irqsave(&emu->voice_lock, flags);
270 for (i = 0; i < emu->max_voices; i++) {
271 vp = &emu->voices[i];
272 if (vp->chan == chan)
273 update_voice(emu, vp, update);
274 }
275 spin_unlock_irqrestore(&emu->voice_lock, flags);
276 }
277
278 /*
279 * Modulate all the voices which belong to the port.
280 */
281 void
282 snd_emux_update_port(struct snd_emux_port *port, int update)
283 {
284 struct snd_emux *emu;
285 struct snd_emux_voice *vp;
286 int i;
287 unsigned long flags;
288
289 if (! update)
290 return;
291
292 emu = port->emu;
293 if (snd_BUG_ON(!emu || !emu->ops.update))
294 return;
295
296 spin_lock_irqsave(&emu->voice_lock, flags);
297 for (i = 0; i < emu->max_voices; i++) {
298 vp = &emu->voices[i];
299 if (vp->port == port)
300 update_voice(emu, vp, update);
301 }
302 spin_unlock_irqrestore(&emu->voice_lock, flags);
303 }
304
305
306 /*
307 * Deal with a controller type event. This includes all types of
308 * control events, not just the midi controllers
309 */
310 void
311 snd_emux_control(void *p, int type, struct snd_midi_channel *chan)
312 {
313 struct snd_emux_port *port;
314
315 port = p;
316 if (snd_BUG_ON(!port || !chan))
317 return;
318
319 switch (type) {
320 case MIDI_CTL_MSB_MAIN_VOLUME:
321 case MIDI_CTL_MSB_EXPRESSION:
322 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_VOLUME);
323 break;
324
325 case MIDI_CTL_MSB_PAN:
326 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
327 break;
328
329 case MIDI_CTL_SOFT_PEDAL:
330 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
331 /* FIXME: this is an emulation */
332 if (chan->control[type] >= 64)
333 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
334 EMUX_FX_FLAG_ADD);
335 else
336 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0,
337 EMUX_FX_FLAG_OFF);
338 #endif
339 break;
340
341 case MIDI_CTL_PITCHBEND:
342 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PITCH);
343 break;
344
345 case MIDI_CTL_MSB_MODWHEEL:
346 case MIDI_CTL_CHAN_PRESSURE:
347 snd_emux_update_channel(port, chan,
348 SNDRV_EMUX_UPDATE_FMMOD |
349 SNDRV_EMUX_UPDATE_FM2FRQ2);
350 break;
351
352 }
353
354 if (port->chset.midi_mode == SNDRV_MIDI_MODE_XG) {
355 snd_emux_xg_control(port, chan, type);
356 }
357 }
358
359
360 /*
361 * terminate note - if free flag is true, free the terminated voice
362 */
363 static void
364 terminate_note1(struct snd_emux *emu, int note, struct snd_midi_channel *chan, int free)
365 {
366 int i;
367 struct snd_emux_voice *vp;
368 unsigned long flags;
369
370 spin_lock_irqsave(&emu->voice_lock, flags);
371 for (i = 0; i < emu->max_voices; i++) {
372 vp = &emu->voices[i];
373 if (STATE_IS_PLAYING(vp->state) && vp->chan == chan &&
374 vp->key == note)
375 terminate_voice(emu, vp, free);
376 }
377 spin_unlock_irqrestore(&emu->voice_lock, flags);
378 }
379
380
381 /*
382 * terminate note - exported for midi emulation
383 */
384 void
385 snd_emux_terminate_note(void *p, int note, struct snd_midi_channel *chan)
386 {
387 struct snd_emux *emu;
388 struct snd_emux_port *port;
389
390 port = p;
391 if (snd_BUG_ON(!port || !chan))
392 return;
393
394 emu = port->emu;
395 if (snd_BUG_ON(!emu || !emu->ops.terminate))
396 return;
397
398 terminate_note1(emu, note, chan, 1);
399 }
400
401
402 /*
403 * Terminate all the notes
404 */
405 void
406 snd_emux_terminate_all(struct snd_emux *emu)
407 {
408 int i;
409 struct snd_emux_voice *vp;
410 unsigned long flags;
411
412 spin_lock_irqsave(&emu->voice_lock, flags);
413 for (i = 0; i < emu->max_voices; i++) {
414 vp = &emu->voices[i];
415 if (STATE_IS_PLAYING(vp->state))
416 terminate_voice(emu, vp, 0);
417 if (vp->state == SNDRV_EMUX_ST_OFF) {
418 if (emu->ops.free_voice)
419 emu->ops.free_voice(vp);
420 if (emu->ops.reset)
421 emu->ops.reset(emu, i);
422 }
423 vp->time = 0;
424 }
425 /* initialize allocation time */
426 emu->use_time = 0;
427 spin_unlock_irqrestore(&emu->voice_lock, flags);
428 }
429
430 EXPORT_SYMBOL(snd_emux_terminate_all);
431
432 /*
433 * Terminate all voices associated with the given port
434 */
435 void
436 snd_emux_sounds_off_all(struct snd_emux_port *port)
437 {
438 int i;
439 struct snd_emux *emu;
440 struct snd_emux_voice *vp;
441 unsigned long flags;
442
443 if (snd_BUG_ON(!port))
444 return;
445 emu = port->emu;
446 if (snd_BUG_ON(!emu || !emu->ops.terminate))
447 return;
448
449 spin_lock_irqsave(&emu->voice_lock, flags);
450 for (i = 0; i < emu->max_voices; i++) {
451 vp = &emu->voices[i];
452 if (STATE_IS_PLAYING(vp->state) &&
453 vp->port == port)
454 terminate_voice(emu, vp, 0);
455 if (vp->state == SNDRV_EMUX_ST_OFF) {
456 if (emu->ops.free_voice)
457 emu->ops.free_voice(vp);
458 if (emu->ops.reset)
459 emu->ops.reset(emu, i);
460 }
461 }
462 spin_unlock_irqrestore(&emu->voice_lock, flags);
463 }
464
465
466 /*
467 * Terminate all voices that have the same exclusive class. This
468 * is mainly for drums.
469 */
470 static void
471 exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, int exclass)
472 {
473 struct snd_emux_voice *vp;
474 int i;
475 unsigned long flags;
476
477 spin_lock_irqsave(&emu->voice_lock, flags);
478 for (i = 0; i < emu->max_voices; i++) {
479 vp = &emu->voices[i];
480 if (STATE_IS_PLAYING(vp->state) && vp->port == port &&
481 vp->reg.exclusiveClass == exclass) {
482 terminate_voice(emu, vp, 0);
483 }
484 }
485 spin_unlock_irqrestore(&emu->voice_lock, flags);
486 }
487
488 /*
489 * terminate a voice
490 * if free flag is true, call free_voice after termination
491 */
492 static void
493 terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free)
494 {
495 emu->ops.terminate(vp);
496 vp->time = emu->use_time++;
497 vp->chan = NULL;
498 vp->port = NULL;
499 vp->zone = NULL;
500 vp->block = NULL;
501 vp->state = SNDRV_EMUX_ST_OFF;
502 if (free && emu->ops.free_voice)
503 emu->ops.free_voice(vp);
504 }
505
506
507 /*
508 * Modulate the voice
509 */
510 static void
511 update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update)
512 {
513 if (!STATE_IS_PLAYING(vp->state))
514 return;
515
516 if (vp->chan == NULL || vp->port == NULL)
517 return;
518 if (update & SNDRV_EMUX_UPDATE_VOLUME)
519 calc_volume(vp);
520 if (update & SNDRV_EMUX_UPDATE_PITCH)
521 calc_pitch(vp);
522 if (update & SNDRV_EMUX_UPDATE_PAN) {
523 if (! calc_pan(vp) && (update == SNDRV_EMUX_UPDATE_PAN))
524 return;
525 }
526 emu->ops.update(vp, update);
527 }
528
529
530 #if 0 // not used
531 /* table for volume target calculation */
532 static const unsigned short voltarget[16] = {
533 0xEAC0, 0xE0C8, 0xD740, 0xCE20, 0xC560, 0xBD08, 0xB500, 0xAD58,
534 0xA5F8, 0x9EF0, 0x9830, 0x91C0, 0x8B90, 0x85A8, 0x8000, 0x7A90
535 };
536 #endif
537
538 #define LO_BYTE(v) ((v) & 0xff)
539 #define HI_BYTE(v) (((v) >> 8) & 0xff)
540
541 /*
542 * Sets up the voice structure by calculating some values that
543 * will be needed later.
544 */
545 static void
546 setup_voice(struct snd_emux_voice *vp)
547 {
548 struct soundfont_voice_parm *parm;
549 int pitch;
550
551 /* copy the original register values */
552 vp->reg = vp->zone->v;
553
554 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
555 snd_emux_setup_effect(vp);
556 #endif
557
558 /* reset status */
559 vp->apan = -1;
560 vp->avol = -1;
561 vp->apitch = -1;
562
563 calc_volume(vp);
564 calc_pitch(vp);
565 calc_pan(vp);
566
567 parm = &vp->reg.parm;
568
569 /* compute filter target and correct modulation parameters */
570 if (LO_BYTE(parm->modatkhld) >= 0x80 && parm->moddelay >= 0x8000) {
571 parm->moddelay = 0xbfff;
572 pitch = (HI_BYTE(parm->pefe) << 4) + vp->apitch;
573 if (pitch > 0xffff)
574 pitch = 0xffff;
575 /* calculate filter target */
576 vp->ftarget = parm->cutoff + LO_BYTE(parm->pefe);
577 LIMITVALUE(vp->ftarget, 0, 255);
578 vp->ftarget <<= 8;
579 } else {
580 vp->ftarget = parm->cutoff;
581 vp->ftarget <<= 8;
582 pitch = vp->apitch;
583 }
584
585 /* compute pitch target */
586 if (pitch != 0xffff) {
587 vp->ptarget = 1 << (pitch >> 12);
588 if (pitch & 0x800) vp->ptarget += (vp->ptarget*0x102e)/0x2710;
589 if (pitch & 0x400) vp->ptarget += (vp->ptarget*0x764)/0x2710;
590 if (pitch & 0x200) vp->ptarget += (vp->ptarget*0x389)/0x2710;
591 vp->ptarget += (vp->ptarget >> 1);
592 if (vp->ptarget > 0xffff) vp->ptarget = 0xffff;
593 } else
594 vp->ptarget = 0xffff;
595
596 if (LO_BYTE(parm->modatkhld) >= 0x80) {
597 parm->modatkhld &= ~0xff;
598 parm->modatkhld |= 0x7f;
599 }
600
601 /* compute volume target and correct volume parameters */
602 vp->vtarget = 0;
603 #if 0 /* FIXME: this leads to some clicks.. */
604 if (LO_BYTE(parm->volatkhld) >= 0x80 && parm->voldelay >= 0x8000) {
605 parm->voldelay = 0xbfff;
606 vp->vtarget = voltarget[vp->avol % 0x10] >> (vp->avol >> 4);
607 }
608 #endif
609
610 if (LO_BYTE(parm->volatkhld) >= 0x80) {
611 parm->volatkhld &= ~0xff;
612 parm->volatkhld |= 0x7f;
613 }
614 }
615
616 /*
617 * calculate pitch parameter
618 */
619 static const unsigned char pan_volumes[256] = {
620 0x00,0x03,0x06,0x09,0x0c,0x0f,0x12,0x14,0x17,0x1a,0x1d,0x20,0x22,0x25,0x28,0x2a,
621 0x2d,0x30,0x32,0x35,0x37,0x3a,0x3c,0x3f,0x41,0x44,0x46,0x49,0x4b,0x4d,0x50,0x52,
622 0x54,0x57,0x59,0x5b,0x5d,0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6f,0x71,0x73,0x75,
623 0x77,0x79,0x7b,0x7c,0x7e,0x80,0x82,0x84,0x86,0x88,0x89,0x8b,0x8d,0x8f,0x90,0x92,
624 0x94,0x96,0x97,0x99,0x9a,0x9c,0x9e,0x9f,0xa1,0xa2,0xa4,0xa5,0xa7,0xa8,0xaa,0xab,
625 0xad,0xae,0xaf,0xb1,0xb2,0xb3,0xb5,0xb6,0xb7,0xb9,0xba,0xbb,0xbc,0xbe,0xbf,0xc0,
626 0xc1,0xc2,0xc3,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,
627 0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdc,0xdd,0xde,0xdf,
628 0xdf,0xe0,0xe1,0xe2,0xe2,0xe3,0xe4,0xe4,0xe5,0xe6,0xe6,0xe7,0xe8,0xe8,0xe9,0xe9,
629 0xea,0xeb,0xeb,0xec,0xec,0xed,0xed,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf1,0xf1,0xf1,
630 0xf2,0xf2,0xf3,0xf3,0xf3,0xf4,0xf4,0xf5,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,0xf7,
631 0xf7,0xf8,0xf8,0xf8,0xf9,0xf9,0xf9,0xf9,0xf9,0xfa,0xfa,0xfa,0xfa,0xfb,0xfb,0xfb,
632 0xfb,0xfb,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,
633 0xfd,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,
634 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
635 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
636 };
637
638 static int
639 calc_pan(struct snd_emux_voice *vp)
640 {
641 struct snd_midi_channel *chan = vp->chan;
642 int pan;
643
644 /* pan & loop start (pan 8bit, MSB, 0:right, 0xff:left) */
645 if (vp->reg.fixpan > 0) /* 0-127 */
646 pan = 255 - (int)vp->reg.fixpan * 2;
647 else {
648 pan = chan->control[MIDI_CTL_MSB_PAN] - 64;
649 if (vp->reg.pan >= 0) /* 0-127 */
650 pan += vp->reg.pan - 64;
651 pan = 127 - (int)pan * 2;
652 }
653 LIMITVALUE(pan, 0, 255);
654
655 if (vp->emu->linear_panning) {
656 /* assuming linear volume */
657 if (pan != vp->apan) {
658 vp->apan = pan;
659 if (pan == 0)
660 vp->aaux = 0xff;
661 else
662 vp->aaux = (-pan) & 0xff;
663 return 1;
664 } else
665 return 0;
666 } else {
667 /* using volume table */
668 if (vp->apan != (int)pan_volumes[pan]) {
669 vp->apan = pan_volumes[pan];
670 vp->aaux = pan_volumes[255 - pan];
671 return 1;
672 }
673 return 0;
674 }
675 }
676
677
678 /*
679 * calculate volume attenuation
680 *
681 * Voice volume is controlled by volume attenuation parameter.
682 * So volume becomes maximum when avol is 0 (no attenuation), and
683 * minimum when 255 (-96dB or silence).
684 */
685
686 /* tables for volume->attenuation calculation */
687 static const unsigned char voltab1[128] = {
688 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
689 0x63, 0x2b, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22,
690 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a,
691 0x19, 0x19, 0x18, 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x14,
692 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10,
693 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0e, 0x0d,
694 0x0d, 0x0d, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b,
695 0x0b, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09,
696 0x08, 0x08, 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06,
697 0x06, 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x04,
698 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02,
699 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01,
700 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
701 };
702
703 static const unsigned char voltab2[128] = {
704 0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x2a,
705 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x24, 0x23, 0x22, 0x21,
706 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1c, 0x1b, 0x1a,
707 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 0x16, 0x16, 0x15, 0x15,
708 0x14, 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x10,
709 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d,
710 0x0d, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b, 0x0b, 0x0a, 0x0a,
711 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09, 0x08, 0x08, 0x08,
712 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
713 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
714 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03,
715 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01,
716 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
717 };
718
719 static const unsigned char expressiontab[128] = {
720 0x7f, 0x6c, 0x62, 0x5a, 0x54, 0x50, 0x4b, 0x48, 0x45, 0x42,
721 0x40, 0x3d, 0x3b, 0x39, 0x38, 0x36, 0x34, 0x33, 0x31, 0x30,
722 0x2f, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26, 0x25,
723 0x24, 0x24, 0x23, 0x22, 0x21, 0x21, 0x20, 0x1f, 0x1e, 0x1e,
724 0x1d, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a, 0x1a, 0x19, 0x18, 0x18,
725 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x15, 0x14, 0x14, 0x13,
726 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10, 0x10, 0x0f, 0x0f,
727 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d, 0x0d, 0x0c, 0x0c, 0x0c,
728 0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09,
729 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
730 0x06, 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03,
731 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,
732 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
733 };
734
735 /*
736 * Magic to calculate the volume (actually attenuation) from all the
737 * voice and channels parameters.
738 */
739 static int
740 calc_volume(struct snd_emux_voice *vp)
741 {
742 int vol;
743 int main_vol, expression_vol, master_vol;
744 struct snd_midi_channel *chan = vp->chan;
745 struct snd_emux_port *port = vp->port;
746
747 expression_vol = chan->control[MIDI_CTL_MSB_EXPRESSION];
748 LIMITMAX(vp->velocity, 127);
749 LIMITVALUE(expression_vol, 0, 127);
750 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
751 /* 0 - 127 */
752 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME];
753 vol = (vp->velocity * main_vol * expression_vol) / (127*127);
754 vol = vol * vp->reg.amplitude / 127;
755
756 LIMITVALUE(vol, 0, 127);
757
758 /* calc to attenuation */
759 vol = snd_sf_vol_table[vol];
760
761 } else {
762 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME] * vp->reg.amplitude / 127;
763 LIMITVALUE(main_vol, 0, 127);
764
765 vol = voltab1[main_vol] + voltab2[vp->velocity];
766 vol = (vol * 8) / 3;
767 vol += vp->reg.attenuation;
768 vol += ((0x100 - vol) * expressiontab[expression_vol])/128;
769 }
770
771 master_vol = port->chset.gs_master_volume;
772 LIMITVALUE(master_vol, 0, 127);
773 vol += snd_sf_vol_table[master_vol];
774 vol += port->volume_atten;
775
776 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
777 if (chan->private) {
778 struct snd_emux_effect_table *fx = chan->private;
779 vol += fx->val[EMUX_FX_ATTEN];
780 }
781 #endif
782
783 LIMITVALUE(vol, 0, 255);
784 if (vp->avol == vol)
785 return 0; /* value unchanged */
786
787 vp->avol = vol;
788 if (!SF_IS_DRUM_BANK(get_bank(port, chan))
789 && LO_BYTE(vp->reg.parm.volatkhld) < 0x7d) {
790 int atten;
791 if (vp->velocity < 70)
792 atten = 70;
793 else
794 atten = vp->velocity;
795 vp->acutoff = (atten * vp->reg.parm.cutoff + 0xa0) >> 7;
796 } else {
797 vp->acutoff = vp->reg.parm.cutoff;
798 }
799
800 return 1; /* value changed */
801 }
802
803 /*
804 * calculate pitch offset
805 *
806 * 0xE000 is no pitch offset at 44100Hz sample.
807 * Every 4096 is one octave.
808 */
809
810 static int
811 calc_pitch(struct snd_emux_voice *vp)
812 {
813 struct snd_midi_channel *chan = vp->chan;
814 int offset;
815
816 /* calculate offset */
817 if (vp->reg.fixkey >= 0) {
818 offset = (vp->reg.fixkey - vp->reg.root) * 4096 / 12;
819 } else {
820 offset = (vp->note - vp->reg.root) * 4096 / 12;
821 }
822 offset = (offset * vp->reg.scaleTuning) / 100;
823 offset += vp->reg.tune * 4096 / 1200;
824 if (chan->midi_pitchbend != 0) {
825 /* (128 * 8192: 1 semitone) ==> (4096: 12 semitones) */
826 offset += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 3072;
827 }
828
829 /* tuning via RPN:
830 * coarse = -8192 to 8192 (100 cent per 128)
831 * fine = -8192 to 8192 (max=100cent)
832 */
833 /* 4096 = 1200 cents in emu8000 parameter */
834 offset += chan->gm_rpn_coarse_tuning * 4096 / (12 * 128);
835 offset += chan->gm_rpn_fine_tuning / 24;
836
837 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
838 /* add initial pitch correction */
839 if (chan->private) {
840 struct snd_emux_effect_table *fx = chan->private;
841 if (fx->flag[EMUX_FX_INIT_PITCH])
842 offset += fx->val[EMUX_FX_INIT_PITCH];
843 }
844 #endif
845
846 /* 0xe000: root pitch */
847 offset += 0xe000 + vp->reg.rate_offset;
848 if (vp->emu->ops.get_pitch_shift)
849 offset += vp->emu->ops.get_pitch_shift(vp->emu);
850 LIMITVALUE(offset, 0, 0xffff);
851 if (offset == vp->apitch)
852 return 0; /* unchanged */
853 vp->apitch = offset;
854 return 1; /* value changed */
855 }
856
857 /*
858 * Get the bank number assigned to the channel
859 */
860 static int
861 get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan)
862 {
863 int val;
864
865 switch (port->chset.midi_mode) {
866 case SNDRV_MIDI_MODE_XG:
867 val = chan->control[MIDI_CTL_MSB_BANK];
868 if (val == 127)
869 return 128; /* return drum bank */
870 return chan->control[MIDI_CTL_LSB_BANK];
871
872 case SNDRV_MIDI_MODE_GS:
873 if (chan->drum_channel)
874 return 128;
875 /* ignore LSB (bank map) */
876 return chan->control[MIDI_CTL_MSB_BANK];
877
878 default:
879 if (chan->drum_channel)
880 return 128;
881 return chan->control[MIDI_CTL_MSB_BANK];
882 }
883 }
884
885
886 /* Look for the zones matching with the given note and velocity.
887 * The resultant zones are stored on table.
888 */
889 static int
890 get_zone(struct snd_emux *emu, struct snd_emux_port *port,
891 int *notep, int vel, struct snd_midi_channel *chan,
892 struct snd_sf_zone **table)
893 {
894 int preset, bank, def_preset, def_bank;
895
896 bank = get_bank(port, chan);
897 preset = chan->midi_program;
898
899 if (SF_IS_DRUM_BANK(bank)) {
900 def_preset = port->ctrls[EMUX_MD_DEF_DRUM];
901 def_bank = bank;
902 } else {
903 def_preset = preset;
904 def_bank = port->ctrls[EMUX_MD_DEF_BANK];
905 }
906
907 return snd_soundfont_search_zone(emu->sflist, notep, vel, preset, bank,
908 def_preset, def_bank,
909 table, SNDRV_EMUX_MAX_MULTI_VOICES);
910 }
911
912 /*
913 */
914 void
915 snd_emux_init_voices(struct snd_emux *emu)
916 {
917 struct snd_emux_voice *vp;
918 int i;
919 unsigned long flags;
920
921 spin_lock_irqsave(&emu->voice_lock, flags);
922 for (i = 0; i < emu->max_voices; i++) {
923 vp = &emu->voices[i];
924 vp->ch = -1; /* not used */
925 vp->state = SNDRV_EMUX_ST_OFF;
926 vp->chan = NULL;
927 vp->port = NULL;
928 vp->time = 0;
929 vp->emu = emu;
930 vp->hw = emu->hw;
931 }
932 spin_unlock_irqrestore(&emu->voice_lock, flags);
933 }
934
935 /*
936 */
937 void snd_emux_lock_voice(struct snd_emux *emu, int voice)
938 {
939 unsigned long flags;
940
941 spin_lock_irqsave(&emu->voice_lock, flags);
942 if (emu->voices[voice].state == SNDRV_EMUX_ST_OFF)
943 emu->voices[voice].state = SNDRV_EMUX_ST_LOCKED;
944 else
945 snd_printk(KERN_WARNING
946 "invalid voice for lock %d (state = %x)\n",
947 voice, emu->voices[voice].state);
948 spin_unlock_irqrestore(&emu->voice_lock, flags);
949 }
950
951 EXPORT_SYMBOL(snd_emux_lock_voice);
952
953 /*
954 */
955 void snd_emux_unlock_voice(struct snd_emux *emu, int voice)
956 {
957 unsigned long flags;
958
959 spin_lock_irqsave(&emu->voice_lock, flags);
960 if (emu->voices[voice].state == SNDRV_EMUX_ST_LOCKED)
961 emu->voices[voice].state = SNDRV_EMUX_ST_OFF;
962 else
963 snd_printk(KERN_WARNING
964 "invalid voice for unlock %d (state = %x)\n",
965 voice, emu->voices[voice].state);
966 spin_unlock_irqrestore(&emu->voice_lock, flags);
967 }
968
969 EXPORT_SYMBOL(snd_emux_unlock_voice);
970
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